The Royal Sovereign RCD-2120 Quick Scan is a counterfeit detector that detects fake bills through instant scanned readings. The RCD-2120 can provide multiple time saving and security benefits for your business. The Quick Scan provides accurate counterfeit readings in just half a second and works with 5s, 10s, 20s, 50s, and 100 dollar bills. Counterfeit detector runs a rigorous multi-level detection process that includes an infrared test, a magnetic ink test, and an image verification tests.